songbinghua created IOTDB-1143:
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Summary: continuous query
Key: IOTDB-1143
URL: https://issues.apache.org/jira/browse/IOTDB-1143
Project: Apache IoTDB
Issue Type: New Feature
Components: Core/Engine
Reporter: songbinghua
Assignee: songbinghua
Continuous Query is a very useful feature for users to query time series data
periodically according to the time interval and time range.
For example, using the continuous query described below, the IoTDB downsamples
the CPU load metric, and keeps a single average datapoint per 15 minutes
grouped by server region:
CREATE CONTINUOUS QUERY "downsampled_cpu_load"
ON database_name
BEGIN
SELECT mean(value) as value,
INTO "downsampled.cpu_load"
FROM cpu_load
GROUP BY time(15m), region
END
However, the IoTDB does not yet support this feature，but the InfluxDB has
supported this feature and many scenario need this feature eagerly. So we need
to support Continuous Query，and I would like to develop it.
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